William Ostrom of The Number said, "Can-do and fun is the ethos of the company.

"We aim to offer a refreshing and helpful service, that is also very cost-effective.

"We chose Cardiff after a big search across the UK, as South Wales offered the staff and skills we needed to provide the best possible service. The advertising campaign has succeeded beyond our wildest dreams, it has attracted a cult following and we even get fan mail.

"In fact we were so inundated with requests for the running shirts worn by the two guys in the advertisement, that we gave 60,000 to Cancer Research and they have already sold out from their shops, raising #50,000 for the charity."